Omar Abdel Rahman at the Metropolitan Correctional Center during an interview in 1995.Credit
Fred R. Conrad/The New York Times

Omar Abdel Rahman, the blind Islamic cleric whose fulminating sermons inspired violent fundamentalist movements in Egypt and, an American court found, a 1993 plot for a bombing rampage in New York, died on Saturday at a federal prison near Raleigh, N.C., where he was serving a life sentence. He was 78.

Greg Norton, a spokesman for the prison, the Butner Federal Correctional Complex, confirmed the death, saying the cause was complications of diabetes and coronary artery disease.

Born to a humble merchant in a Nile Delta village and blind from infancy, Mr. Abdel Rahman became one of the most influential and fearsome theologians of the Islamist fundamentalism that swept the Middle East in recent decades.

On Oct. 1, 1995, Mr. Abdel Rahman was convicted, along with nine other defendants, on sedition charges in Federal District Court in Manhattan. He was found guilty of guiding a conspiracy to wage “a war of urban terrorism,” with the ultimate aim of carrying out a day of bombings against the Holland and Lincoln Tunnels, the George Washington Bridge, the United Nations and the Manhattan headquarters of the F.B.I.

Those bombings never happened, but the intent of the conspiracy, prosecutors said, was to destroy New York landmarks, kill hundreds of people and force the United States to abandon its support for Israel and Egypt.

Prosecutors also asserted that Mr. Rahman was linked to the 1993 bombing of the World Trade Center, which killed six people.

In Mr. Abdel Rahman’s trial, prosecutors described the World Trade Center attack as part of a broader conspiracy involving the blind cleric. They depicted the bombing as part of a plot that included the killing of a militant rabbi in 1990 and the conspiracy to blow up New York landmarks.

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Emad Salem, right, escorting Mr. Abdel Rahman from an interview in March 1993.Credit
Edward Keating/The New York Times

Before coming to the United States, Mr. Abdel Rahman was put on trial in Egypt. In 1980, according to courtroom testimony there, he gave a blessing to a cell of militant Islamists, emboldening them to assassinate President Anwar el-Sadat during a military parade on Oct. 6, 1981, in Cairo.

Mr. Abdel Rahman faced trial twice in Egypt for instigating Mr. Sadat’s assassination and for political disturbances that erupted at the time. Twice, in 1982 and 1984, he was acquitted.

In learned but vitriolic jeremiads, Mr. Abdel Rahman denounced Egypt’s secularist leaders as corrupt pharaohs and infidels. He proclaimed that faithful Muslims had a duty to wage jihad, or holy war, to install a government in Egypt that would obey the strictest Islamic laws. He denounced what he saw as the corrosive effect on Islam of the materialistic and hypersexualized West.

In 1990, as he fled from Egypt, Mr. Abdel Rahman moved to the United States, bringing his anti-American preaching and his campaign against the Egyptian president, Hosni Mubarak, to mosques in Brooklyn and Jersey City.

Mr. Abdel Rahman, who was known as the blind sheikh, spent years in the most severe solitary confinement, barred from communicating with his followers, praying with other prisoners or even listening to Arabic radio. Failing blood circulation had killed the sensation in his fingertips, making it impossible for him to read his Braille Islamic texts.

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Mr. Abdel Rahman was born on May 3, 1938, in a small village in the Nile Delta. An infection blinded him at 10 months. When he became an adult, his right eye remained open but clouded while his left eye stayed closed.

Sent to a school for the blind, he excelled, learning Braille and memorizing the Quran by the time he was 11. He trained to be an Islamic scholar, completing his doctoral degree in 1973 at Al-Azhar University in Cairo, the world’s premier center of Islamic learning.

Mr. Abdel Rahman first antagonized the Egyptian authorities in 1970 when he barred the faithful in a mosque where he was presiding, in the town Fayoum, from praying after the death of President Gamal Abdel Nasser, a secularist. He was imprisoned for several months.

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Mr. Abdel Rahman during a news conference in New Jersey in April 1993.Credit
Ozier Muhammad/The New York Times

Soon he began to espouse a doctrine, rooted in 14th-century Quranic interpretation, holding that devout Muslims were obliged to kill rulers who did not follow Islamic law. Saad Hasaballah, a lawyer who represented Mr. Abdel Rahman in the Sadat assassination trials, said the sheikh told the Islamist army officers involved in the plot that a secular leader like Mr. Sadat deserved death — although he never mentioned the president by name.

In 1984, Egypt’s highest court found that Mr. Abdel Rahman had been tortured while in prison during the trials. Years later, at a news conference in New Jersey, he enumerated 12 methods of torture he said jailers had used.

During the 1980s, Mr. Abdel Rahman emerged as the imam of the Islamic Group, a student organization that grew to include thousands of members. Over more than a decade, the group carried out terrorist attacks, including many on tourist sites, killing foreigners and paralyzing Egypt’s tourism industry. The government responded fiercely, imprisoning thousands of the group’s followers.

Mr. Abdel Rahman also traveled that decade to Afghanistan and Pakistan, giving religious teachings to the Islamist fighters battling the Soviet occupation. He brought two of his sons, Ahmed and Muhammad, still teenagers, to Afghanistan to join the jihad. His preaching there brought him in contact with Osama bin Laden.

In 1989, Mr. Abdel Rahman was put on trial again in Egypt, charged with instigating an antigovernment riot in Fayoum. Placed under house arrest, he managed to escape. On July 18, 1990, he traveled to New York, carrying a visa granted by the United States consulate in Sudan. Since his name had appeared on a State Department terrorism watch list, the visa prompted outrage in Congress and an investigation of the immigration agency. Still, Mr. Abdel Rahman did little to mute his sermons when he took up preaching in Brooklyn and Jersey City.

After several of the bomb plot suspects were arrested in the act of mixing a brew of explosives, Mr. Abdel Rahman surrendered to federal authorities on July 2, 1993.

His trial hinged on transcripts of secretly recorded meetings with an F.B.I. informant, Emad Salem. He was represented by the civil rights lawyer Lynne Stewart, who was convicted in 2004 of smuggling messages from the imprisoned sheikh to his followers in Egypt. She was granted compassionate release from federal prison three years ago after being found to have breast cancer.

In court, Mr. Abdel Rahman maintained his innocence. At his January 1996 sentencing, he called the trial “an attack on the words of God” and said the United States, “an enemy of Islam,” was seeking to give him “a slow death.”

Corey Kilgannon contributed reporting.

A version of this article appears in print on February 20, 2017, on Page B5 of the New York edition with the headline: Omar Abdel Rahman, 78; Plotted Terrorist Attacks. Order Reprints|Today's Paper|Subscribe